Post Offices List in Calhoun County, South Carolina:
| Cameron Post Office | 304 Boyce Lawton Dr, Cameron, SC 29030 |
| Saint Matthews Post Office | 616 F R Huff Dr, Saint Matthews, SC 29135 |
| Cameron Post Office | 304 Boyce Lawton Dr, Cameron, SC 29030 |
| Saint Matthews Post Office | 616 F R Huff Dr, Saint Matthews, SC 29135 |